44663161021 has 2 divisors, whose sum is σ = 44663161022. Its totient is φ = 44663161020.

The previous prime is 44663161019. The next prime is 44663161117. The reversal of 44663161021 is 12016136644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39466192921 + 5196968100 = 198661^2 + 72090^2 .

It is a cyclic number.

It is not a de Polignac number, because 44663161021 - 2¹ = 44663161019 is a prime.

Together with 44663161019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44663161001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22331580510 + 22331580511.

It is an arithmetic number, because the mean of its divisors is an integer number (22331580511).

Almost surely, 2^44663161021 is an apocalyptic number.

It is an amenable number.

44663161021 is a deficient number, since it is larger than the sum of its proper divisors (1).

44663161021 is an equidigital number, since it uses as much as digits as its factorization.

44663161021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 44663161021 its reverse (12016136644), we get a palindrome (56679297665).

The spelling of 44663161021 in words is "forty-four billion, six hundred sixty-three million, one hundred sixty-one thousand, twenty-one".